#organisation

### to learn

finite elements and alternative : 
- the immersion method, 
- [the method of R-functions](https://asmedigitalcollection.asme.org/appliedmechanicsreviews/article-abstract/48/4/151/401230/R-Functions-in-Boundary-Value-Problems-in)
Zig-Zag Theories 

[[Secondary articles descriptions#Layerwise Analyses VEM]]
the principle of virtual displacement (PVD)
complex eigenvalue problems
modal strain energy technique

### questions

good resources to learn ?